Not to high jack this thread too much but do all IMPs use a briar-style tenon system? Anyone have problems with that type of tenon system?
As with the old threaded tenons, they glue a insert into the meerschaum shank. In this case, I think it's a tube of Delrin. Then the tenon is also Delrin or similar.
The tenon doesn't mate with the meerschaum at all, only the reinforcing Delrin insert.